If Dems take the oval office, senate, and keep the house, there should be no expansion of the SC unless the majority of Americans want it. If the conservative court acts egregiously, the public will turn against them and support adding justices. Even then, it shouldn't be enough new seats to make liberal justices a majority, just enough for parity. If the court can manage not to piss off the public, congress shouldn't add seats. They SHOULD add PR as a state, though.
I'm not anti-Christian. I'm anti-stupid.